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TM-9-2350-311-34-2 Maintenance Manual for Volume 2 M109 Cab Download

Page 146 of 552

5-4 TM 9-2350-311-34-2 5-1 MOUNT AND HOWITZER WITH TRUNNION BRACKET - CONTINUED a. Removal - Continued 3 Remove seven cap screws (7) and seven Iockwashers (8) on upper gun rotor (9). Upper gun rotor will re- main in place until cannon assembly (10) is elevated. Discard Iockwashers. Failure to open bleeder valves could damage elevating piston rod. 4 Open front and rear bleeder valves on the equilibrated elevation mechanism assembly. This will prevent bending of elevating piston rod (11). 5 Attach gun tube sling (12) and hoist (13) to muzzle brake (14). Two personnel are required for removal of upper gun rotor. Upper gun rotor weighs approximately 75 pounds (34 kg) and may cause injury if dropped. 6 Raise cannon assembly (10) to maximum elevation and remove upper gun rotor (9) from inside cab.